Data from: A revision of Sesuvium (Aizoaceae, Sesuvioideae) Author Bohley, Katharina Author Winter, Pieter J. D. Author Kadereit, Gudrun text Data in brief 2017 2017-01-03 48 1 109071 109071 http://dx.doi.org/10.5061/dryad.tk922 journal article 10.5061/dryad.tk922 SESUVIUM TRIANTHEMOIDES Correll in Rhodora 68: 422. 1966 .— TYPE : U. S. A., Texas: Kenedy County, dunes, 11 Jul 1947 , Tharp 47431 ( holotype : TEX!) Slender procumbent to ascending, annual herb; stems pale and thin (diam ∼ 2.5 mm ), roots relatively short; scattered large bladder cells on leaves and stems and fine white dots around the axils. Leaves oblanceolate, flat, lamina up to 20 mm long and 8 mm wide, with a distinct petiole, lateral flaps wide (∼ 2 mm ). Flowers sessile , about 6 mm long, one pair of bracts at base; inconspicuous tepal teeth compared to other species of the genus. Stamens five. Ovary with 2 carpels and 2 styles. Fruit large and tapered capsules with broad bases, often exceeding the length of the tepals; styles rarely still attached to the ripe capsule, often only two short tips remain. Seeds up to 1.5 mm long, reniform, with a slightly structured seed coat, dull black, brown or grey. Distribution and Habitat — The species appears to be strictly endemic in Texas, U. S. A ( Fig. 9 ). It grows on sandy soil, probably near rivers. Vernacular Name — Texas sea purslane. Representative specimens examined — U. S. A. Texas, Kenedy County: Dunes, 11 Jul 1947 , Tharp 47431 (TEX); San Patricio County: 9.7 km from Sinton, sandy soil along Aransas River, 28 Jun 1954 , F. B. Jones 964 (BRIT). Notes — Only two specimens were seen, since no other material was available. It would be very desirable to increase the number of specimens in collections. There is a close resemblance between S. trianthemoides and S. maritimum , but due to distinctive morphological traits such as large and tapered capsules and the 2-carpelate ovary their status as separate species seems justified.